package com.aiguigu.interactive;

import java.util.concurrent.locks.Condition;
import java.util.concurrent.locks.Lock;
import java.util.concurrent.locks.ReentrantLock;

class ShareData {
    private int flag = 1;
    Lock lock = new ReentrantLock();
    Condition condition1 = lock.newCondition();
    Condition condition2 = lock.newCondition();
    Condition condition3 = lock.newCondition();


    public void print5() throws InterruptedException {
        lock.lock();
        try {
            //判断
            while (flag != 1) {
                condition1.await();
            }
            //干活
            for (int i = 1; i <= 5; i++) {
                System.out.println(Thread.currentThread().getName()+"  "+i);
            }
            flag = 2;
            //通知
            condition2.signal();

        } finally {
            lock.unlock();
        }
    }

    public void print10() throws InterruptedException {
        lock.lock();
        try {
            while(flag!=2){
                condition2.await();
            }
            for (int i = 1; i <= 10; i++) {
                System.out.println(Thread.currentThread().getName()+"  "+i);
            }
            flag=3;
            condition3.signal();
        } finally {
            lock.unlock();
        }
    }

    public void print15() throws InterruptedException {
        lock.lock();
        try {
            while(flag!=3){
                condition3.await();
            }
            for (int i = 1; i <= 15; i++) {
                System.out.println(Thread.currentThread().getName()+"  "+i);
            }
            flag=1;
            condition1.signal();
        } finally {
            lock.unlock();
        }
    }
}

//多线程之间按顺序调用，实现A->B->C
// * 三个线程启动，要求如下：
//   AA打印5次，BB打印10次，CC打印15次
// * 接着
// * AA打印5次，BB打印10次，CC打印15次
// * ......来10轮
// *  *
public class ThreadOrderAccess {

    public static void main(String[] args) {
        ShareData shareData = new ShareData();

        new Thread(()->{
            for (int i = 0; i < 10; i++) {
                try {
                    shareData.print5();
                } catch (InterruptedException e) {
                    throw new RuntimeException(e);
                }
            }
        },"AA").start();
        new Thread(()->{
            for (int i = 0; i < 10; i++) {
                try {
                    shareData.print10();
                } catch (InterruptedException e) {
                    throw new RuntimeException(e);
                }
            }
        },"BB").start();
        new Thread(()->{
            for (int i = 0; i < 10; i++) {
                try {
                    shareData.print15();
                } catch (InterruptedException e) {
                    throw new RuntimeException(e);
                }
            }
        },"CC").start();

    }
}
